Lot of 2 Counterfeit Kansas Nebraska Overprint Stamps 1922-34 w/ California FDC

Book 1:  Counterfeit Kansas Nebraska Overprints on 1922-34 Issue by Robert Schoen and James T. DeVoss.  1973.  33 pages.

Book 2:  Counterfeit Kansas Nebraska Overprints on 1922-34 Issues (Including California Varities) plus First Day Covers. 1977 Second Printing.  33 pages.

Please see pictures.